Steam-engine lubricator



(No Model.)

W. H. CRAIG.

STEAM ENGINE LUBRIGATOR.

No. 331,772. I Patented Bed. 8, 1885.

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XVARFEN HILL AIi-D CRAIG, OF LAWRENCE, MASSACHUSETTS.

STEAM=ENGINE LUBRICATGR.

CPEGIFEOATEZGH forming part of Letters Patent No. 331,772, dated December 8, 1885.

Application filed October 14, 1885.

To CLZZ whom it may concern.-

Be it known that I, \VAltREN Hi'LLLiRD CRAIG, of Lawrence, in the county of Essex, of the Commonwealth of Massachusetts, have invented a new and useful Improvement in. Steam-Engine Lubricators; and I do hereby declare the same to be described in the follow ing specification and represented in the accompanying drawings, of which Figure 1 is a vertical and median cross-section of a lubricator having my invention, the nature of which is duly defined in the claims hereinafter presented. Fig. 2 is a side eleva tion, and Fig. 3 a longitudinal section, of the part of the lubricator that is below the oilreservoir, and serves to connect the said reservoir with a steamengiue and its boiler. The plane of section of said Fig. 3 is at right anglcs to that of Fig. 1.

The lubricator shown in Fig. 1 is what is termed a sight-feed oiler, its oil-reservoir being shown at A, the steam-condenser at B, and the sight-feed or observation window or port at- G. D is the pipe that leads from the steam-passage E upward into the condenser, nearly to the top thereof, the said passage extending from a chamber, F, through the oilrescrvoir. G is the oil -discharge passage, which at itslower end opens into the chamber F. H is the oil-reservoir filling-opening, provided with its closing screw-plug I. K is the water-passage, leading from the condenser to the observationchamber, that opens into or communicates, as usual, with the oil-reservoir, the screw-plug of such passage being shown at L. M is the passage for draining oil or water from the reservoir into the chamber F, such passage being provided with a screwplug, N.

The abovementioned parts, with the exception of the connection 0, provided with the chamber F, are common to the sight-feed lubricator. The said chamber F, or the connection, 0, containing it, is joined to the oil-reservoir by a right'and-leit screw-coupling, P, screwed on necks a and 3), extending, as shown, from the said connection and the oil-reservoir. Such chamber F has aside of it in the connec tion 0 a passage, 0, to lead steam into such chamber from the boiler, there being in the lower part of such passage a valve-seat pro- Sorial X0. 179,544. (No model.)

vided with a valve, (2, to open upward. At the opening of the said passage 0 into the chamber F there is a screw-plug, 6, whose operative knob is shown at f. Extending out of the chamber Fis another passage, g, to lead to the valve-chest of the engine-cylinder, such passage at its mouth being provided with a screw-plug, h, arranged as represented.

\Vhen the lubricator is in use, steam from the boiler passes up through the passagecinto the chamber F, the screwplug 6 being supposed to be drawn. back to allow of the flow of steam into the said chamber. From the chamber F the steam passes through the pas sage E and the tube D into the condenser E, wherein such steam becomes condensed, the water of condensation passing in drops through the observationchamber, and thence into the oil-reservoir, oil from such reservoir at the same time flowing into the passage G at its top and down through such passage into the chamber F. With the steam escaping from the said chamber through the passage g, the

oil will be carried to the valve-chest.

By means of the chamber F, with its passages, valve, and screw-phi gs arranged as described, I am enabled to maintain a practicallynnii'orm pressure of steam within the lubricator while it is automatically perforiniug its work, such being effected by opening the screw-plugs more or less, as may berequired, to attain such uniformity of pressure as the pressure in the valve-chest may change. Furthermore, in case of a derangement of the lubricator from any cause that will prevent it from so operating, the steam may be shut off by closing the plug c,an(1 opening the plugs h, N, and I, and turning oil into the feedingorifice H. Oil from the reservoir will then I flow into the chamber F, and from thence through the passage r to the valvechest, the throttle-valve of the engine being closed while such is being done. Furthermore, in case of it becoming necessary to remove the oilreservoir from the part- 0, the latter, with its chant ber F, can be used temporarily as a means of supplying oil to the valve-chest. In this case the plug 6 should be closed and the plug h opened. On oil being poured into the chamber F, such oil will be sucked therefrom into and through the passage 1 provided the engine may be in operation after the closing of 2. The combination, with the oil-reservoir its throttle-valve.

The Valve (1 is to prevent any oil from being discharged into the boiler by back-pressure from the valve-chest.

WVithout the drainagepassage M and its plug N to the lubricator, the connection 0, having the chamber F, steam-inlet passage 0, and oil-outlet passage with their screwplugs, can be employed to advantage.

1. The combination, with the oil-reservoir of a lubricator provided with the steam and oil passages E and G, and with the drainagepassage M and its screw-plug N, as described, of the connection 0, having the chamber F, the steam-inlet passage 0, the oil-outlet passage g, and the screw-plugs e and h thereto, all being arranged substantially and tooperate as set forth.

of a lubricator provided with the steam and oil passages E and G, as described, of the connection 0, having the chamber F, steam-inlet passage 0, oil-outlet passage 9, and the screwplugs e and h thereto, all essentially as set forth.

3. The connection 0, having the chamber F, steam-inlet passage 0, valve d, oil-outlet passage 9, and the screw-plugs e and h, arranged substantially as represented, such con nection having its upper part provided with a neck opening out of the chamber andscrewthreaded for joining the connection to the oilreservoir of the lubricator, as specified.

WARREN HILLIARD CRAIG.

\Vitnesses:

R. H. EDDY, R. B. TORREY. 

